如何在 SQl 查询中找到 Substring=

Question

select * from "ParaListen" where Auftrag='235829/PAOrtsA'

How can I find a certain "Substring" in an Pervasive-statement?

Select select * from "ParaListen" where substr(Auftrag,8,?)='PAOrtsA'

I mean: which function shows the rest of the string after the "/" character?

Answer 1

Rather than substring , I would suggest the right function. With right , you can use the position or locate function to get the position of the '/' and get the rest of the string without needing to know the length of the remaining string. Something like:

create table ParaListen1
 (f1 char(100), 
 auftrag char(14));

insert into ParaListen1
(f1, auftrag) values ('235829/PAOrtsA', '235829/PAOrtsA');

insert into ParaListen1
(f1, auftrag) values ('235829/PAOrtsB', '235829/PAOrtsB');

select position('/',auftrag),locate('/',auftrag), f1, auftrag from "ParaListen1" 
 where right(Auftrag,position('/',auftrag))='PAOrtsA'